Study on Cutting Treatments and Shading Methods to Enhance PropagationEfficiency in Schisandra chinensis

Background: While Schisandra chinensis (Turcz.) Baill. holds significant medicinal and economic value, its propagation through cuttings is challenging because of difficulty in identifying optimal rooting conditions.BR/Methods and Results: Uncultivated sandy loam was used as rooting medium, and double-layer shade nets and an inner plastic enclosure created controlled shading environments for cuttings. A preliminary study monitored weekly growth, revealing a rooting time exceeding eight weeks, which underlies Schisandra's propagation difficulty. Shoot and root traits were investigated at three and four months to identify optimal shading and cutting treatments. The most effective setup required application of both outer and inner shade layers, providing 85% and 75% shading, respectively, for 8 weeks (inner) and 12 weeks (outer ). This regimen significantly enhanced growth. Greenwood cuttings performed better than semi-hardwood cuttings, and apical pinching two weeks before harvesting promoted bud formation, further improving shoot and root development.BR/Conclusions: Optimized shading and cutting treatments improved Schisandra chinensis rooting and growth, enabling standardized propagation and supporting broader distribution.